Model # 45W

Internet #100320352

Store SKU #409926

Store SO SKU #1000203202

Owens Corning FOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing

Owens Corning

FOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing

  • Closed cell rigid foam board, easy to handle, cut and install
  • Compressive strength of 15 psi, R-value of 10
  • Lifetime Limited Warranty for the life of the home
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Frequently Bought Together

Product Overview

Choosing The Right Insulation

Faced Insulation


Face insulation uses kraft paper vapor barrier to control moisture transmission between 
walls and floors 

*Check your local building code for requirements
Unfaced Insulation


Unfaced insulation does not have a vapor barrier; used over existing insulation in the attic, or where moisture control is not needed

Rolls Insulation


Continuous rolls are easy to transport and can be cut to length; great for large areas

Batts Insulation


Come in pre-cut lengths for faster installation and each package contains more square feet than rolls; ideal for framed cavities

Blow-In Insulation

Blow-In Insulation

Installed using blowing machines, best for adding additional insulation in attic

Regional R-Values

Regional R-Values Map

The Department of Energy recommends different insulation
levels based on regional climate zones to increase energy efficiency

Map key with insulation type based on region

FOAMULAR Extruded Polystyrene (XPS) Rigid Foam Insulation offers a comprehensive line of products in a wide choice of sizes, thicknesses and edges with a Lifetime Limited Warranty for the life of the home or building. The products are easy to handle, score, cut and install & no special tools are needed. Products can be used on wood, steel framing or concrete walls. FOAMULAR XPS resists moisture and retains R-value even after exposure to standing water and wet soil. Only XPS foam to be GREENGUARD Gold Certified and the first XPS foam certified by Scientific Certification Systems (SCS) to contain a minimum of 20 percent recycled content.

  • Dimensions: 2 in. x 4 ft. x 8 ft.
  • Application: Exterior sheathing & interior basement walls
  • Designed to resist moisture and helps to block mildew
  • Has a higher R-value than wood fiber, plywood or 1/2 in. gypsum board products

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Length (ft.)
8 ft
Product Thickness (in.)
2 in
Product Width (in.)


Faced or Unfaced
Insulation Application Type
Exterior Sheathing,Exterior Wall Foundation
Insulation R-Value
Insulation Type
Product Weight (lb.)
Sheathing Type

Warranty / Certifications

Warranty Information
Lifetime Limited

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Customer Questions & Answers

regular insulation is rated R-30-60, how does this relate for insulation? Am using to insulate a ceiling on a flat roof home.

Asked by: Anonymous
For roofing application, use Thermapink, extruded XPS (similar to Foamular)...comes in 1", 1½", 2", 3", 4" thicknesses, R5 per inch. Can use multiple layers to achieve desired R value.
Answered by: Bill
Date published: 2016-12-31


Asked by: 5121200
Yes absolutely sandable, unlike bead foam it does not break up when sanded. I creat stage props all the time from this but you must must must wear a good mask. There will be a fine dust you don't want to breath. I cut with a jig saw, or Lind blade box knife then sand by hand with a fine sand paper. Orbital sander also works but you need a light hand. You can easily and lightly sand of text for painting and for durability I coast with a flexible coating such as flex coat or sculptor coat about $50 a gallon available at local theater supply stores or online at Rosebrand. It paints beautifully with acrylic or latex paints. Spray paint will melt uncoated foam.
Answered by: Sherart77
Date published: 2017-03-16

is this the styro foam that you put on the outside of a basement cement wall

Asked by: linda
no, type IV, 25 psi compression required by building code below ground. Foamular 250.
Answered by: Budman
Date published: 2017-07-03

Would this be suitable to insulate a dog house?

Asked by: thc5
What does "scored" mean? What adhesive should I use to attach it to a horizontal surface?
Answered by: BUNK
Date published: 2015-12-30
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Customer Reviews

FOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing is rated 4.8 out of 5 by 21.
Rated 5 out of 5 by from Strength I used these to put on my roof of my RV and hard top awning. I painted them white and put patio blocks along the edges to keep rain from raining in between the camper and awning
Date published: 2017-07-12
Rated 5 out of 5 by from Awesome medium for stage props I love using these insulation foam boards for stage displays. They are light to transport but very sturdy. They withstand tons of handling. Using water-based exterior paint, they last through many seasons outdoors.
Date published: 2017-05-23
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2017-04-05
Rated 5 out of 5 by from I had a HomeOwner's Assoc. request a new sign to replace an old, weathered redwood sand-blasted s... I had a HomeOwner's Assoc. request a new sign to replace an old, weathered redwood sand-blasted sign. I suggested bonding two pieces of an 1/8" Aluminum substrate to either side of a sheet of Foamular 150 to make the new sign. They agreed, and I was able to cut the foam to shape with an electric carving knife easily. I used 100% Silicone for bonding, and a dark brown paintable silicone around the outer edge, clamping it together until cured. All the faux-painting of wood grain, shadows and letters were done in Acrylic House Paints.
Date published: 2017-01-10
Rated 5 out of 5 by from Fantastic results... I had two objectives... 1. Insulation 2. reduce noise for neighbors. I accomplished both. I used this 2" foam insulation in my 12 x 16 shop walls and ceiling. I then sealed any gaps with Great Stuff foam spray. The shop is now tight and can be heated with only a small ceramic 1500 watt heater. It's 28degress outside and I am able to be content in my shop. These panels were easy to score and snap to the appropriate size. Would highly recommend!
Date published: 2013-12-30
Rated 5 out of 5 by from I have a bathroom floor that is built on 2 x 6's on a cement slab. The bathroom gets very cold... I have a bathroom floor that is built on 2 x 6's on a cement slab. The bathroom gets very cold in the winter. I wanted to put insulation under the shower floor area an along the 2x6' sides and end. I pressed the 2" insulation up so that it contacted the floor. I have seen a 100% improvement in the temperature in the bathroom. The product met my expectations and was easy to trim to size with a drywall saw
Date published: 2017-01-04
Rated 5 out of 5 by from Great product for DIY archery targets... Odd, I know, but get one 8'x4' sheet of this and cut it into 24"x16" sections at 2" thick, stack them into a wooden frame and compress with either ratchet straps or some sort of threaded rod on either side. Makes for an excellent 24"x24" faced target capable of handling broadheads for less than half the price of an 18"x18" Block classic target. Even better, when a section starts chunking, just loosen the compression and move a layer up or down. DIY archery target, works a treat, light weight, lasts a while and saves a fair amount of money. Mine has lasted 3 years of minor to moderate broadhead and field point use from a 50lb recurve before needing to have the layers rotated, totally serious.
Date published: 2016-08-08
Rated 5 out of 5 by from Used as hydronic floor heating underlayment I installed 2" thick Owens-Corning foamular sheets around the perimeter of and under my new pole barn prior to installing hydronic heating tube (PEX). I bought them in 4x8' sheets and they were pre-scored so they could be easily broken into 16" or 24" widths. They were also easy to cut to custom widths using a drywall knife - you only have to score them about 1/2" deep and they break easily along the score line. I also used my sabre saw to cut them using a knife-type blade. The material is light and easy to work with. My only beef would be the price.
Date published: 2009-08-29
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